I have had decent success downloading the full installer. Usually that works without going to recovery but sometimes that is easier for people. But I only go to newer bridge, not regress so you might need someone to hack together a regression step if the full installer doesn’t get your the briegeOS you seek.

Your process is the same to retry an install if Big Sur (or any oter upgrade) fails.

softwareupdate --fetch-full-installer --full-installer-version 10.14.6

Or you could go to the Mojave install page:

• https://support.apple.com/en-ca/HT211683

I have had decent success downloading the full installer. Usually that works without going to recovery but sometimes that is easier for people. But I only go to newer bridge, not regress so you might need someone to hack together a regression step if the full installer doesn’t get your the briegeOS you seek.

Your process is the same to retry an install if Big Sur (or any oter upgrade) fails.

softwareupdate --fetch-full-installer --full-installer-version 10.14.6

Or you could go to the Mojave install page:

• https://support.apple.com/en-us/HT211683